File "D:\python_work\learning_log\users\urls.py", line 4, in <module>
    from django.contrib.auth.views import login
ImportError: cannot import name 'login' from 'django.contrib.auth.views' (D:\python_work\learning_log\ll_env\lib\site-packages\django\contrib\auth\views.py)

"""为应用程序users定义URL模式"""
from django.conf.urls import url
from django.contrib.auth.views import login
from . import views
urlpatterns = [
    # 登录页面
    url(r'^login/$',login,{'template_name':'users/login.html'},
        name='login'),
从 django-1.11开始,基于函数的登录,注销等视图已被重写为基于类的视图： LoginView 和 LogoutView类,如 release notes中所指定的那样.仍然可以使用“旧的”基于函数的视图,但是被标记为已弃用.
在django-2.1中,已删除旧的基于功能的视图,如release notes中所述.
解决办法：
"""为应用程序users定义URL模式"""
from django.conf.urls import url
from django.contrib.auth.views import LoginView
from . import views
urlpatterns = [
    # 登录页面
    url(r'^login/$',LoginView.as_view(template_name='users/login.html'),
        name='login'),
    #path('login/', LoginView.as_view(template_name='users/login.html'), name="login"),
app_name ='users'